(19)
(11) EP 4 279 165 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.11.2023 Bulletin 2023/48

(43) Date of publication A2:
22.11.2023 Bulletin 2023/47

(21) Application number: 23171808.1

(22) Date of filing: 05.05.2023
(51) International Patent Classification (IPC): 
B01D 46/00(2022.01)
B01D 46/64(2022.01)
 B01D 46/24(2006.01)
(52) Cooperative Patent Classification (CPC):
B01D 46/2411; B01D 46/003; B01D 46/0031; B01D 46/64
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 17.05.2022 GB 202207194

(71) Applicant: Walker Filtration Ltd
Tyne and Wear NE38 9DA (GB)

(72) Inventor:
  • MARSHALL, Philip
    WASHINGTON, NE38 9DA (GB)

(74) Representative: Mewburn Ellis LLP 
Aurora Building Counterslip
Bristol BS1 6BX
Bristol BS1 6BX (GB)

   


(54) MULTI-STAGE COALESCING FILTER


(57) The present invention provides a multi-stage coalescing filter for separating coalesced liquid from an aerosol-containing gas stream. The multi-stage coalescing filter includes an end cap having a chamber formed within and a plurality of coaxial, nested, tubular filter elements supported upright on the end cap. Pairs of successive filter elements are spaced from each other such that the end cap between pairs of successive filter elements forms respective annular sumps for collection of coalesced liquid separated by the filter elements from the aerosol-containing gas stream as it passes radially through the nested filter elements. The chamber has one or more inlets in fluid communication with the or each sump for receiving the coalesced liquid from the sump, and further has one or more outlets for guiding the received coalesced liquid out of the filter. The chamber houses a porous element which is configured to saturate under contact with the received coalesced liquid so as to allow the received coalesced liquid to flow through the porous element to the outlet while simultaneously preventing the aerosol-containing gas stream from passing through the chamber to bypass the nested filter elements.










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